GB/T 31925-2015 (English Version) PDF

Standard No.: GB/T 31925-2015
Language: Chinese, Available in English version
Release Date: 2015
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 31925-2015

Scope: This standard specifies the piezoelectric ultrasonic inspection principle, inspection method, comparison sample, flaw detection equipment, inspection conditions, inspection procedures, result evaluation, and inspection report of seamless steel pipes with a wall thickness to outer diameter ratio greater than 0.2 and less than 0.3. This standard applies to ultrasonic testing of longitudinal and transverse defects of thick-walled seamless steel pipes for various purposes with an outer diameter not less than 6 mm. The flaw detection methods described in this standard are mainly used for the detection of metal discontinuity defects in steel pipes, and are not suitable for the detection of layered defects. The inspection of steel pipes with wall thickness to outer diameter ratio greater than or equal to 0.3 shall be carried out according to the method negotiated between the supplier and the purchaser.

GB/T 31925-2015 Referenced Document

GB/T 5777-2008 Ultrasonic testing method for seamless steel pipe
GB/T 9445 Non-destructive testing.Qualification and certification of NDT personnel*， 2015-12-10 Update
JB/T 10061 Commonly used specification for A-mode ultrasonic flaw detector using pulse echo technique
YB/T 4082 Comprehensive performance testing method of automatic ultrasonic inspection system for steel pipes and steel rods*， 2020-12-09 Update

2015 GB/T 31925-2015 Ultrasonic test methods of heavy wall thickness seamless steel pipes and tubes